Ferguson, S. H., Taylor, M. K. and Messier, F.  2000.  Influence of sea ice dynamics on habitat selection by polar bears.  Ecology,  81 ( 3): 761
 
Huang, S., Pollack, H. N., and  Shen, P-Y.   2000.  Temperature trends over the past five centuries reconstructed from  borehole temperatures.  Nature, 403, n 6771:  756
 
Crowell, J.  C.   1999. Pre-Mesozoic Ice Ages: Their Bearing on Understanding the Climate
System.   Memoir Geological Society of America, v. 192.

Goslar, T., Arnold, M., Tisnerat-Laborde, M., Czernik, J., and Wickowski, K. 2000.   Variations of Younger Dryas atmospheric radiocarbon explicable without ocean circulation changes. Nature 403, 877 - 880.

The concentration of radiocarbon, 14C, in the atmosphere depends on its production rate by cosmic rays, and on the intensity of carbon exchange between the atmosphere and other reservoirs, for example the deep oceans. For the Holocene (the past 11,500 years), it has been shown that fluctuations in atmospheric radiocarbon concentrations have been caused mostly by variations in the solar magnetic field. Recent progress in extending the radiocarbon record backwards in time has indicated especially high atmospheric radiocarbon concentrations in the Younger Dryas cold period, between 12,700 and 11,500 years before the present. These high concentrations have been interpreted as a result of a reduced exchange with the deep-ocean reservoir, caused by a drastic weakening of the deep-ocean ventilation. Here we present a high-resolution reconstruction of atmospheric radiocarbon concentrations, derived from annually laminated sediments of two Polish lakes, Lake Goci ż and Lake Perespilno. These records indicate that the maximum in atmospheric radiocarbon concentrations in the early Younger Dryas was smaller than previously believed, and might have been caused by variations in solar activity. If so, there is no indication that the deep-ocean ventilation in the Younger Dryas was significantly different from today's.
 

2000. NRC sure global warming is `real'/Inauspicious build up to biosafety
protocol. Nature, 403 (n 6767): 233.

Caldeira, K.and Duffy, P.B. 2000. The Role of the Southern Ocean in Uptake and Storage of Anthropogenic Carbon Dioxide. Science, 287(5453): 620.

Moore Jr., T.C., Walker, J.C.G. and Smith, A.J. 2000. Younger Dryas interval and outflow from the Laurentide ice. Paleoceanography, 15 (1): 4.

Herzog, Howard,  Eliasson, Baldur,  Kaarstad, Olav, 2000,
Capturing Greenhouse Gases. Scientific American.
2000 v 282( no. 2): 72.
(To minimize the global-warming effects of burning fossil fuels, we could
 catch and bury the carbon dioxide wastes deep underground or in the
 oceans. In accompanying commentary, David W. Keith and Edward A. Parson
 discuss the policy implications of this ambitious environmental scheme).

Alverson, K. D., Oldfield, F., and Bradley, R.S. (eds.)  2000.  Past Global Changes And Their Signigficance For The Future. Quaternary Science Reviews
(29 papers many of which are very useful summaries of the current knowledge of global climate changes interpreted from ice cores, marine cores, and terrestrial records. Several of the papers address the question of global warming and future climate change).

Ekart, D.D. Cerling, T.E., and Tabor, N.J. 1999. A 400 million year carbon isotope record of pedogenic carbonate implications for paleoatmospheric carbon dioxide. American Journal of Science, 299 (10): 805.

Parrish, J.T., 1998, Interpreting pre-Quaternary climate from the geologic
record: New York, NY, Columbia University Press. [QC 884 .P37 1998]